Lock-pin.



' V. V. PITTMA N.

- LOCK PIN.

APPLIQATIOR FILED NOV. 20. 1967.

Patented Oct. 20,1968.

Gum,

Till Namus PETERS co., wasnmcrmv, n, c.

VINCENT V. PITTMAN, OF SANTA CRUZ, CALIFORNIA.

LOCK-PIN..

Specification of Letters Patent.

Patented Oct. 20, 1908.

Application filed. November 20, 1907. Serial No. 403,071.

To all whom it may concern:

Be it known that I, VINCENT V. PITTMAN, a citizen of the United States,residing at Santa Cruz, in the county of Santa Cruz and State ofCalifornia, have invented new and useful Improvements in Lock-Pins, ofwhich the following is a specification.

This invention relates to lock pins, the obj ect of the invention beingto provide a lock pin embodying two pivotally connected curved membersone of which is pointed and the other recessed to receive the end of thepointed member, in connection with a clamping device for securelyclamping the pointed end of the pin to the recessed end of the othermember thereof.

With the above general object in view, the invention consists in thenovel construction, combination and arrangement hereinafter fullydescribed, illustrated and claimed.

In the accompanying drawings :Figure 1 is a sectional elevation of thepin embodying the present invention, shown closed. Fig. 2 is a similarview of the pin, shown open. Fig. 3 is a detail cross section throughthe pin as shown in Fig. 1, taken in about line with the pivot of theclamping cam. Fig. 4: 1s a cross section through the pin, showing themanner of forming the clamping jaws. Fig. 5 is a longitudinal section ofthe clamping aws.

The lock pin contemplated in this invention comprises essentially twomembers, one of which may be termed the pin member 1 and the other thesocket member 2. The socket member 2 comprises an outer tubular casingor sleeve 3 within which the clamping jaws 4: and 5 are housed.

The clamping jaws may be formed of a. single piece of spring metal andrecurved or folded upon itself as indicated in Figs. 1, 2 and 5, thesame being preferably formed of half round material as shown in Fig. 4with the flat sides brought together.

The two clamping jaws formed in the manner above described are bent intosubstantially semi-circular form and inserted or held tightly in thecasing or sleeve 3 with the extremities of the jaws reaching to thecorresponding extremity of the casing 3. In order to provide for theinsertion of the pointed extremities of the pin 1 between the jaws, oneor both of the jaws may be decreased in thickness as shown in Fig. 3soas to admit the pin between the jaws and also allow for the necessaryplay of one of the jaws to release the pin when thej aw itself isreleased, the tendency of the jaw being to spring away from the pin soas to readily release it.

The tubular casing or sleeve 3 is provided near the pin point receivingend with oppositely located pivot lugs 6 between which is mounted a cam7 having a handle 8 the cam being pivotally connected with the lug 6 bymeans of a pin 9 or its equivalent.

The disposition of the cam relatively to its operating handle is suchthat when the handle 8 is thrown towards the adjacent end of the casingor sleeve 3, the jaws will separate to release the pin point and whensaid handle is swung in the reverse direction to the position shown inFig. 1, the head of the cam will press the adjacent jaw against the sideof the pin point and clamp the pin securely between the two jaws, thusmaking a perfectly safe lock for the pin when closed.

10 designates a slot in one end of the casing which permits the pinmember 1 to swing outward to the position shown in Fig. 2. Both membersof the pin are substantially semicircular and arranged so that whenclosed they will form a ring as shown in Fig. 1.

I claim 1. A look pin comprising two pivotally connected semi-circularmembers, opposing jaws 011 one member between which the point of theother member is received, and a cam operating in conjunction with thejaws to clamp the pin point.

2. A look pin comprising two pivotally connected semi circular membersone of which is pointed, a movable jaw on the other member, and a clampto force said jaw against the pointed member to lock the free ends ofthe two members together.

In testimony whereof I afiix my signature in presence of two witnesses.

VINCENT V. PITTMAN.

Witnesses:

EMMET C. RrrTENHoUsn, J. L. J onns'ron.

